config.py

   1 import ConfigParser
   2 import logging
   3 import os
   4 import re
   5 import random
   6 import string
   7 import sys
   8 from ConfigParser import NoOptionError
   9
  10 guid = ''.join([random.choice(string.letters) for i in range(10)])
  11
  12 config = ConfigParser.ConfigParser()
  13
  14 p = os.path.dirname(__file__)
  15 config_files = ['/etc/pyTivo.conf', os.path.join(p, 'pyTivo.conf')]
  16
  17 configs_found = config.read(config_files)
  18 if not configs_found:
  19     print ('ERROR: pyTivo.conf does not exist.\n' +
  20            'You must create this file before running pyTivo.')
  21     sys.exit(1)
  22
  23 def reset():
  24     global config
  25     newconfig = ConfigParser.ConfigParser()
  26     newconfig.read(config_files)
  27     config = newconfig
  28
  29 def write():
  30     f = open(configs_found[-1], 'w')
  31     config.write(f)
  32     f.close()
  33
  34 def getGUID():
  35     if config.has_option('Server', 'GUID'):
  36         return config.get('Server', 'GUID')
  37     else:
  38         return guid
  39
  40 def getTivoUsername():
  41     return config.get('Server', 'tivo_username')
  42
  43 def getTivoPassword():
  44     return config.get('Server', 'tivo_password')
  45
  46 def getBeaconAddresses():
  47     if config.has_option('Server', 'beacon'):
  48         beacon_ips = config.get('Server', 'beacon')
  49     else:
  50         beacon_ips = '255.255.255.255'
  51     return beacon_ips
  52
  53 def getPort():
  54     return config.get('Server', 'Port')
  55
  56 def get169Blacklist(tsn):  # tivo does not pad 16:9 video
  57     return tsn and not isHDtivo(tsn) and not get169Letterbox(tsn)
  58     # verified Blacklist Tivo's are ('130', '240', '540')
  59     # It is assumed all remaining non-HD and non-Letterbox tivos are Blacklist
  60
  61 def get169Letterbox(tsn):  # tivo pads 16:9 video for 4:3 display
  62     return tsn and tsn[:3] in ['649']
  63
  64 def get169Setting(tsn):
  65     if not tsn:
  66         return True
  67
  68     tsnsect = '_tivo_' + tsn
  69     if config.has_section(tsnsect):
  70         if config.has_option(tsnsect, 'aspect169'):
  71             try:
  72                 return config.getboolean(tsnsect, 'aspect169')
  73             except ValueError:
  74                 pass
  75
  76     if get169Blacklist(tsn) or get169Letterbox(tsn):
  77         return False
  78
  79     return True
  80
  81 def getShares(tsn=''):
  82     shares = [(section, dict(config.items(section)))
  83               for section in config.sections()
  84               if not (section.startswith(('_tivo_', 'logger_', 'handler_',
  85                                           'formatter_'))
  86                       or section in ('Server', 'loggers', 'handlers',
  87                                      'formatters')
  88               )
  89     ]
  90
  91     tsnsect = '_tivo_' + tsn
  92     if config.has_section(tsnsect) and config.has_option(tsnsect, 'shares'):
  93         # clean up leading and trailing spaces & make sure ref is valid
  94         tsnshares = []
  95         for x in config.get(tsnsect, 'shares').split(','):
  96             y = x.strip()
  97             if config.has_section(y):
  98                 tsnshares.append((y, dict(config.items(y))))
  99         if tsnshares:
 100             shares = tsnshares
 101
 102     return shares
 103
 104 def getDebug():
 105     try:
 106         return config.getboolean('Server', 'debug')
 107     except NoOptionError, ValueError:
 108         return False
 109
 110 def getOptres(tsn=None):
 111     if tsn and config.has_section('_tivo_' + tsn):
 112         try:
 113             return config.getboolean('_tivo_' + tsn, 'optres')
 114         except NoOptionError, ValueError:
 115             pass
 116     try:
 117         return config.getboolean('Server', 'optres')
 118     except NoOptionError, ValueError:
 119         return False
 120
 121 def getPixelAR(ref):
 122     if config.has_option('Server', 'par'):
 123         try:
 124             return (True, config.getfloat('Server', 'par'))[ref]
 125         except NoOptionError, ValueError:
 126             pass
 127     return (False, 1.0)[ref]
 128
 129 def get(section, key):
 130     return config.get(section, key)
 131
 132 def getFFmpegTemplate(tsn):
 133     if tsn and config.has_section('_tivo_' + tsn):
 134         try:
 135             return config.get('_tivo_' + tsn, 'ffmpeg_tmpl', raw=True)
 136         except NoOptionError:
 137             pass
 138     try:
 139         return config.get('Server', 'ffmpeg_tmpl', raw=True)
 140     except NoOptionError: #default
 141         return '%(video_codec)s %(video_fps)s %(video_br)s %(max_video_br)s \
 142                 %(buff_size)s %(aspect_ratio)s -comment pyTivo.py %(audio_br)s \
 143                 %(audio_fr)s %(audio_ch)s %(audio_codec)s %(audio_lang)s \
 144                 %(ffmpeg_pram)s %(format)s'
 145
 146 def getFFmpegPrams(tsn):
 147     if tsn and config.has_section('_tivo_' + tsn):
 148         try:
 149             return config.get('_tivo_' + tsn, 'ffmpeg_pram', raw=True)
 150         except NoOptionError:
 151             pass
 152     try:
 153         return config.get('Server', 'ffmpeg_pram', raw=True)
 154     except NoOptionError:
 155         return None
 156
 157 def isHDtivo(tsn):  # tsn's of High Definition Tivo's
 158     return tsn and tsn[:3] in ['648', '652', '658']
 159
 160 def getValidWidths():
 161     return [1920, 1440, 1280, 720, 704, 544, 480, 352]
 162
 163 def getValidHeights():
 164     return [1080, 720, 480] # Technically 240 is also supported
 165
 166 # Return the number in list that is nearest to x
 167 # if two values are equidistant, return the larger
 168 def nearest(x, list):
 169     return reduce(lambda a, b: closest(x, a, b), list)
 170
 171 def closest(x, a, b):
 172     if abs(x - a) < abs(x - b) or (abs(x - a) == abs(x - b) and a > b):
 173         return a
 174     else:
 175         return b
 176
 177 def nearestTivoHeight(height):
 178     return nearest(height, getValidHeights())
 179
 180 def nearestTivoWidth(width):
 181     return nearest(width, getValidWidths())
 182
 183 def getTivoHeight(tsn):
 184     if tsn and config.has_section('_tivo_' + tsn):
 185         try:
 186             height = config.getint('_tivo_' + tsn, 'height')
 187             return nearestTivoHeight(height)
 188         except NoOptionError:
 189             pass
 190     try:
 191         height = config.getint('Server', 'height')
 192         return nearestTivoHeight(height)
 193     except NoOptionError: #defaults for S3/S2 TiVo
 194         if isHDtivo(tsn):
 195             return 720
 196         else:
 197             return 480
 198
 199 def getTivoWidth(tsn):
 200     if tsn and config.has_section('_tivo_' + tsn):
 201         try:
 202             width = config.getint('_tivo_' + tsn, 'width')
 203             return nearestTivoWidth(width)
 204         except NoOptionError:
 205             pass
 206     try:
 207         width = config.getint('Server', 'width')
 208         return nearestTivoWidth(width)
 209     except NoOptionError: #defaults for S3/S2 TiVo
 210         if isHDtivo(tsn):
 211             return 1280
 212         else:
 213             return 544
 214
 215 def _trunc64(i):
 216     return max(int(strtod(i)) / 64000, 1) * 64
 217
 218 def getAudioBR(tsn=None):
 219     # convert to non-zero multiple of 64 to ensure ffmpeg compatibility
 220     # compare audio_br to max_audio_br and return lowest
 221     if tsn and config.has_section('_tivo_' + tsn):
 222         try:
 223             audiobr = _trunc64(config.get('_tivo_' + tsn, 'audio_br'))
 224             return str(min(audiobr, getMaxAudioBR(tsn))) + 'k'
 225         except NoOptionError:
 226             pass
 227     try:
 228         audiobr = _trunc64(config.get('Server', 'audio_br'))
 229         return str(min(audiobr, getMaxAudioBR(tsn))) + 'k'
 230     except NoOptionError:
 231         return str(min(384, getMaxAudioBR(tsn))) + 'k'
 232
 233 def _k(i):
 234     return str(int(strtod(i)) / 1000) + 'k'
 235
 236 def getVideoBR(tsn=None):
 237     if tsn and config.has_section('_tivo_' + tsn):
 238         try:
 239             return _k(config.get('_tivo_' + tsn, 'video_br'))
 240         except NoOptionError:
 241             pass
 242     try:
 243         return _k(config.get('Server', 'video_br'))
 244     except NoOptionError: #defaults for S3/S2 TiVo
 245         if isHDtivo(tsn):
 246             return '8192k'
 247         else:
 248             return '4096K'
 249
 250 def getMaxVideoBR():
 251     try:
 252         return _k(config.get('Server', 'max_video_br'))
 253     except NoOptionError: #default to 30000k
 254         return '30000k'
 255
 256 def getVideoPCT():
 257     try:
 258         return config.getfloat('Server', 'video_pct')
 259     except NoOptionError:
 260         return 70
 261
 262 def getBuffSize(tsn=None):
 263     tsnsect = '_tivo_' + tsn
 264     if tsn and config.has_section(tsnsect):
 265         if config.has_option(tsnsect, 'bufsize'):
 266             try:
 267                 return _k(config.get(tsnsect, 'bufsize'))
 268             except NoOptionError:
 269                 pass
 270     if config.has_option('Server', 'bufsize'):
 271         try:
 272             return _k(config.get('Server', 'bufsize'))
 273         except NoOptionError:
 274             pass
 275     if isHDtivo(tsn):
 276         return '4096k'
 277     else:
 278         return '1024k'
 279
 280 def getMaxAudioBR(tsn=None):
 281     # convert to non-zero multiple of 64 for ffmpeg compatibility
 282     if tsn and config.has_section('_tivo_' + tsn):
 283         try:
 284             return _trunc64(config.get('_tivo_' + tsn, 'max_audio_br'))
 285         except NoOptionError:
 286             pass
 287     try:
 288         return _trunc64(config.get('Server', 'max_audio_br'))
 289     except NoOptionError:
 290         return int(448) # default to 448
 291
 292 def get_tsn(name, tsn=None):
 293     if tsn and config.has_section('_tivo_' + tsn):
 294         try:
 295             return config.get('_tivo_' + tsn, name)
 296         except NoOptionError:
 297             pass
 298     try:
 299         return config.get('Server', name)
 300     except NoOptionError:
 301         return None
 302
 303 def getAudioCodec(tsn=None):
 304     return get_tsn('audio_codec', tsn)
 305
 306 def getAudioCH(tsn=None):
 307     return get_tsn('audio_ch', tsn)
 308
 309 def getAudioFR(tsn=None):
 310     return get_tsn('audio_fr', tsn)
 311
 312 def getAudioLang(tsn=None):
 313     return get_tsn('audio_lang', tsn)
 314
 315 def getCopyTS(tsn=None):
 316     return get_tsn('copy_ts', tsn)
 317
 318 def getVideoFPS(tsn=None):
 319     return get_tsn('video_fps', tsn)
 320
 321 def getVideoCodec(tsn=None):
 322     return get_tsn('video_codec', tsn)
 323
 324 def getFormat(tsn=None):
 325     return get_tsn('format', tsn)
 326
 327 # Parse a bitrate using the SI/IEEE suffix values as if by ffmpeg
 328 # For example, 2K==2000, 2Ki==2048, 2MB==16000000, 2MiB==16777216
 329 # Algorithm: http://svn.mplayerhq.hu/ffmpeg/trunk/libavcodec/eval.c
 330 def strtod(value):
 331     prefixes = {'y': -24, 'z': -21, 'a': -18, 'f': -15, 'p': -12,
 332                 'n': -9,  'u': -6,  'm': -3,  'c': -2,  'd': -1,
 333                 'h': 2,   'k': 3,   'K': 3,   'M': 6,   'G': 9,
 334                 'T': 12,  'P': 15,  'E': 18,  'Z': 21,  'Y': 24}
 335     p = re.compile(r'^(\d+)(?:([yzafpnumcdhkKMGTPEZY])(i)?)?([Bb])?$')
 336     m = p.match(value)
 337     if not m:
 338         raise SyntaxError('Invalid bit value syntax')
 339     (coef, prefix, power, byte) = m.groups()
 340     if prefix is None:
 341         value = float(coef)
 342     else:
 343         exponent = float(prefixes[prefix])
 344         if power == 'i':
 345             # Use powers of 2
 346             value = float(coef) * pow(2.0, exponent / 0.3)
 347         else:
 348             # Use powers of 10
 349             value = float(coef) * pow(10.0, exponent)
 350     if byte == 'B': # B == Byte, b == bit
 351         value *= 8;
 352     return value
 353
 354 def init_logging():
 355     if (config.has_section('loggers') and
 356         config.has_section('handlers') and
 357         config.has_section('formatters')):
 358
 359         logging.config.fileConfig(config_files)
 360
 361     elif getDebug():
 362         logging.basicConfig(level=logging.DEBUG)
 363     else:
 364         logging.basicConfig(level=logging.INFO)